Diamond brooch/collier de chien, early 20th century

The openwork articulated plaque of garland design, set with circular-, single-cut and rose diamonds, illustrated as a choker on black ribbon, brooch fitting detachable.

Indistinct assay marks and stamped with the letter A to reverse on both sides. Diamonds bright and lively, estimated total diamond weight approximately 6.00 - 8.00 carats. Largest diamond weighing approximately 0.80 - 1.20 carats. Diamonds estimated to be approximately I-J colour, SI - I clarity on average, as graded within the limitations of the mount. One floral motif deficient. Attachable to black velvet choker via slide fittings, and to brooch fitting via screws at corners. overall dimensions of plaque approximately 52 x 78mm. Choker approximately 310mm x 50mm. Light scratches and areas of discolouration to metal surfaces consistent with age and wear. In good condition.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."